Subject: Re: Harpers Electronic Ignition for Loopframes
Author: PEHA-@aol.com
Date: May 5, 2003, 11:12 AM
Post ID: 1712872962
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In a message dated 5/4/2003 3:41:52 PM Pacific Daylight Time, mut-@msn.com
writes:
| when the bike gets good and hot in traffic in Georgia it detonates when the throttle is applied quickly |
First, how old are your valve guides. Many Guzzis have problems with guide
wear after about 30K miles. Just a little oil leakage past the intake guide
on the suction stroke and you really deteriorate the relative octane rating
of the air/fuel mixture. Might be thinking about a valve job. Not enough
for smoke or for significant oil usage, but enough to alter the mixture
properties.
Second, how old are the advance springs in your distributor? And, does
Harpers use their own advancing mechanism or rely on your original? As the
springs age, they get weak and allow the advance to happen to soon at too low
an rpm. Thus pinging.
Third, I sure hope you're using premium grade fuel.
Patrick
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<HTML><FONT FACE=arial,helvetica><FONT SIZE=2>In a message dated 5/4/2003 3:41:52 PM Pacific Daylight Time, mut-@msn.com writes:<BR>
<BR>
<BR>
<BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">when the bike gets good and hot in<BR>
traffic in Georgia it detonates when the throttle is applied quickly</BLOCKQUOTE><BR>
<BR>
First, how old are your valve guides. Many Guzzis have problems with guide wear after about 30K miles. Just a little oil leakage past the intake guide on the suction stroke and you really deteriorate the relative octane rating of the air/fuel mixture. Might be thinking about a valve job. Not enough for smoke or for significant oil usage, but enough to alter the mixture properties.<BR>
<BR>
Second, how old are the advance springs in your distributor? And, does Harpers use their own advancing mechanism or rely on your original? As the springs age, they get weak and allow the advance to happen to soon at too low an rpm. Thus pinging.<BR>
<BR>
Third, I sure hope you're using premium grade fuel.<BR>
<BR>
Patrick</FONT></HTML>
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